GRRR wires wires and more wires

So here I am working on an 85 gmc wrangler half ton 4x4 problem ran smooth as it could till it got home friend had his lunch and went to go back to work turns the key evrything powers up but the starter....so i go through all the ground wires i can find ,pull old starter bench test it nothing go fetch new one from local parts shop bench test it before installing it all is well so we think turn the key and same problem we started with.:CRY: so i go the the exspensive motions getting fingures stuck switching ignition switch still nuttin hmm play with the nuetral start switch till i am blue in the face...NOW this is where i start thinking real hard till my head hurts i cannot find one and one fusable link in this harness anywhere is this a normal thing for an 85 gmc or am i just blind my 1977 silverado has three of em 2 on the fire wall and one on the starter..any help is great and thanks in advance guys

Harness for sure uses a fusable link wire. No reason for it to suddenly burn up though. Have you checked voltage at the solenoid while turning the key? If it looks good it is a bad solenoid.

Kitz